[Intel-gfx] [PATCH v2 03/16] drm/i915/guc: Add send_and_receive() helper function

[Michal Wajdeczko]

In the previous patch we have changed signature of the send function
pointer but we didn't modify signature of the corresponding helper
function to minimize number of required changes. Let's add separate
helper to expose new functionality but still hide underlying details.

v2: enforce response buffer size check (Michal)

Signed-off-by: Michal Wajdeczko <michal.wajdeczko at intel.com>
Cc: Oscar Mateo <oscar.mateo at intel.com>
Cc: Michel Thierry <michel.thierry at intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
---
 drivers/gpu/drm/i915/intel_uc.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_uc.h b/drivers/gpu/drm/i915/intel_uc.h
index 53ea5f1..482dfa5 100644
--- a/drivers/gpu/drm/i915/intel_uc.h
+++ b/drivers/gpu/drm/i915/intel_uc.h
@@ -235,6 +235,16 @@ static inline int intel_guc_send(struct intel_guc *guc, const u32 *action, u32 l
 	return guc->send(guc, action, len, NULL);
 }
 
+static inline int intel_guc_send_and_receive(struct intel_guc *guc,
+					     const u32 *action, u32 len,
+					     u32 *response_buf, u32 size)
+{
+	BUILD_BUG_ON(!__builtin_constant_p(size));
+	BUILD_BUG_ON(size < GUC_CT_MSG_LEN_MASK);
+
+	return guc->send(guc, action, len, response_buf);
+}
+
 static inline void intel_guc_notify(struct intel_guc *guc)
 {
 	guc->notify(guc);
-- 
2.7.4